Nondefinitive Spec/std Data: 1 TYPE AND 1 STYLE AND B GRADE AND T-2 CLASS AND B FINISH
Unable to Decode: UNABLE TO DECODE
Material: STEEL
Cutting Edge Finish: UNGROUND
Identification
NSN: 3455-00-243-2121
NIIN: 002432121
FSC: 3455 — Cutting Tools for Machine Tools
FSG: 34 — Metalworking Machinery (continued)
General Description
The Cutter Bit,tool Holder, cataloged under National Stock Number 3455-00-243-2121, is classified within Federal Supply Class 3455 (Cutting Tools for Machine Tools) of the Metalworking Machinery (continued) group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
3455-00-243-2121
Item Name
Cutter Bit,tool Holder
FSC / FSG
3455 / 34 — Cutting Tools for Machine Tools
Status
ACTIVE
Usage Design
CUTTING-OFF TOOL HOLDER
Overall Thickness
0.093 INCHES NOMINAL IN
Shape
BEVELED
Nondefinitive Spec/std Data
1 TYPE AND 1 STYLE AND B GRADE AND T-2 CLASS AND B FINISH
Unable to Decode
UNABLE TO DECODE
Material
STEEL
Cutting Edge Finish
UNGROUND
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3455-00-243-2123POSSIBLE MATCH
CUTTER BIT,TOOL HOLDER
Possible match (shared part number)
3455-00-272-9778POSSIBLE MATCH
CUTTER BIT,TOOL HOLDER
Possible match (shared part number)
3455-00-272-9789POSSIBLE MATCH
CUTTER BIT,TOOL HOLDER
Possible match (shared part number)
3455-00-988-4667POSSIBLE MATCH
CUTTER BIT,TOOL HOLDER
Possible match (shared part number)
3455-01-243-3629POSSIBLE MATCH
CUTTER BIT,TOOL HOLDER
Possible match (shared part number)
3455-01-243-7018POSSIBLE MATCH
CUTTER BIT,TOOL HOLDER
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
00C851
4/1Identification reference
U.S. Government activity
Related Parts
3455-00-243-2123POSSIBLE MATCH
CUTTER BIT,TOOL HOLDER
3455-00-272-9778POSSIBLE MATCH
CUTTER BIT,TOOL HOLDER
3455-00-272-9789POSSIBLE MATCH
CUTTER BIT,TOOL HOLDER
3455-00-988-4667POSSIBLE MATCH
CUTTER BIT,TOOL HOLDER
3455-01-243-3629POSSIBLE MATCH
CUTTER BIT,TOOL HOLDER
3455-01-243-7018POSSIBLE MATCH
CUTTER BIT,TOOL HOLDER
Frequently Asked Questions
What is NSN 3455-00-243-2121?
NSN 3455-00-243-2121 is a Cutter Bit,tool Holder, classified under FSC 3455, Cutting Tools for Machine Tools. Status: active.
What NSN replaces 3455-00-243-2121?
6 possible matches (shared part number, not a government interchangeability claim): 3455-00-243-2123, 3455-00-272-9778, 3455-00-272-9789. Verify interchangeability with system specifications before substitution.
What are the specifications of 3455-00-243-2121?
Key specifications for 3455-00-243-2121: Usage Design: CUTTING-OFF TOOL HOLDER; Overall Thickness: 0.093 INCHES NOMINAL IN; Shape: BEVELED; Overall Length: 4.500 INCHES NOMINAL IN. 7 specifications are documented in the U.S. Government catalog.
Is NSN 3455-00-243-2121 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.